I always wanted to watch Rock & Rule when it came out around 1982 or so. But it looked like a movie that might not live up to its hype, and as I recall, got very bad reviews, and so I never saw it. Although many great movies get panned unfairly by critics, and are still great. John Carpenter's 1982 remake of THE THING, for example.
I don't even recall Rock & Rule getting played after its release on cable!
But nice that I can try it here now free of charge, thank you.
The three coolest animated movies for me are the Beatles' YELLOW SUBMARINE, the 1976 film WIZARDS, and HEAVY METAL.
Of the more recent computer-animated fare, I thought WALL-E and UP were both outstanding. Warm, sentimental, playful, but also intelligent, making these two movies enjoyable for both adults as well as children.